**Forecast models from sources including Open-Meteo, GFS, and Chinese meteorological services point to a nocturnal minimum near 20°C in Shanghai on October 2 under mostly overcast skies, northeasterly winds around 10–15 km/h, and minimal precipitation.** This setup limits radiative cooling overnight, keeping the low from dropping further while preventing significant warming. Minor model spreads arise from differences in expected cloud thickness and the exact timing of any partial clearing, which could nudge the reading between 19–21°C. Historical October averages for the city hover near 15–18°C for lows, so current conditions reflect a relatively mild early-autumn pattern. Traders appear to price in slightly higher outcomes, likely weighting ensemble means and recent verification trends; the next official station reports and updated model runs overnight will provide the clearest resolution signals.